      1   1 Identifier a
      1   3 Op_assign
      1   5 LeftParen
      1   6 Op_subtract
      1   7 Integer 1 
      1   9 Op_multiply
      1  11 LeftParen
      1  12 LeftParen
      1  13 Op_subtract
      1  14 Integer 1 
      1  16 Op_multiply
      1  18 LeftParen
      1  19 Integer 5 
      1  21 Op_multiply
      1  23 Integer 15 
      1  25 RightParen
      1  26 RightParen
      1  28 Op_divide
      1  30 Integer 10 
      1  32 RightParen
      1  33 RightParen
      1  34 Semicolon
      2   1 Keyword_print
      2   6 LeftParen
      2   7 Identifier a
      2   8 Comma
      2  10 String "\n"
      2  14 RightParen
      2  15 Semicolon
      3   1 Identifier b
      3   3 Op_assign
      3   5 Op_subtract
      3   6 Identifier a
      3   7 Semicolon
      4   1 Keyword_print
      4   6 LeftParen
      4   7 Identifier b
      4   8 Comma
      4  10 String "\n"
      4  14 RightParen
      4  15 Semicolon
      5   1 Keyword_print
      5   6 LeftParen
      5   7 Op_subtract
      5   8 Identifier b
      5   9 Comma
      5  11 String "\n"
      5  15 RightParen
      5  16 Semicolon
      6   1 Keyword_print
      6   6 LeftParen
      6   7 Op_subtract
      6   8 LeftParen
      6   9 Integer 1 
      6  10 RightParen
      6  11 Comma
      6  13 String "\n"
      6  17 RightParen
      6  18 Semicolon
      7   1 End_of_input
